{"as_of":"2026-11-09","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Model families","items":[{"count":14,"name":"Texas Helicopter Corp OH-13","note":"","unit":"registered","url":"https://eflight.com/models/texas-helicopter-corp/oh-13"}],"relation":"makes"},{"group":"Engines","items":[{"count":5,"name":"Lycoming VO-435 series","note":"260 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-vo-435-series"},{"count":3,"name":"Lycoming VO-435-A1F","note":"250 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-vo-435-a1f"},{"count":2,"name":"Lycoming VO-540 series","note":"310 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-vo-540-series"}],"relation":"powered by"},{"group":"Type certificates","items":[{"count":null,"name":"Scott'S-Bell 47 INC","note":"holds the FAA type certificates","unit":"","url":""}],"relation":"held by"},{"group":"Where they are","items":[{"count":5,"name":"Michigan","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MI"},{"count":3,"name":"Illinois","note":"","unit":"of these aircraft","url":"https://eflight.com/states/IL"},{"count":2,"name":"Kansas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/KS"},{"count":1,"name":"Wyoming","note":"","unit":"of these aircraft","url":"https://eflight.com/states/WY"},{"count":1,"name":"Nebraska","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NE"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":5,"name":"Hhi Farms LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/hhi-farms-llc"},{"count":3,"name":"Hendrickson Flying Service INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/hendrickson-flying-service-inc"},{"count":1,"name":"Magnum Aviation LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/magnum-aviation-llc"}],"relation":"owned by"},{"group":"Record","items":[{"count":10,"name":"NTSB accidents and incidents involving Texas Helicopter Corp aircraft","note":"as the NTSB spells the maker's name","unit":"cases since 1982","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"involved in"},{"group":"Analytics","items":[{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"},{"count":null,"name":"Accidents by model and by maker","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"id":"texas-helicopter-corp","name":"Texas Helicopter Corp","registered":15,"type":"maker","url":"https://eflight.com/makers/texas-helicopter-corp"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}